28e8265651
In order to support LIKE statement filter in OVO objects, StringMatchingFilterObj class is introduced. However, this class does not provide initial attributes of "starts", "contains" and "ends". In real usage, if these attributes are not initialized, we will hit failures in method apply_filters() in db/_model_query.py. This patch adds the initialization back. Secondly, a typo of "obj_utils.StringMatchingContains" is revised in this patch too. Change-Id: If828068d8d08ff09dff6c63d53320bc397d32448 Closes-Bug: #1724446